Once in a while I like to visit £1 stores as they often have camping and outdoor gear. I am normally on the look out for items I use all the time such as paracord, guy lines, pegs and fire lighters. Then on the bottom shelf I spotted something I had never seen before in a store like this, it was an emergency shelter.
It is an 8ft x 5ft tunnel made out of a space blanket type material and has 20ft or cord to erect it with, aimed at people who undertake activities in remote areas where a shelter might need to be erected quickly in the event of an emergency.
It packs down small and weighs next to nothing, making it ideal to keep in your bag. It could be modified with some duct tape, pegs and two survival blankets to make a shelter resembling a ridge tent. At the cost of £1 why not just buy it for the kids to make a shelter with in the garden.